| Assignment | Frequency (cm−1) | Assignment | Frequency (cm−1) |
| ῡ (O-H) wat, as | 3874 | ῡ (C = C) im, t | 1589.13 |
| ῡ (O-H) wat, ss | 3708 | ῡ (C-H) et, r | 1542.04 |
| ῡ (N-H) im, s | 3692 | ῡ (C = N) im, s | 1518.11 |
| ῡ (C-H) im, s | 3328 | ῡ (C-H) form, r | 1396.48 |
| ῡ (C-H) et, as | 3146 | ῡ (C-O) form, ss | 1298.2 |
| ῡ (C-H) et, ss | 3045 | ῡ (Zn-O) as | 414.42 |
| ῡ (C-H) form, s | 3031 | ῡ (Zn-O) ss | 385.32 |
| ῡ (C = O) form, ss | 16067 |
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